What is the Lounge?
lounge room or lounge ( in the United Kingdom, Australia, Ireland and New Zealand ), is a room for entertaining adult guests, reading, or other activities. The term front room can also be used to describe a living room, because in many homes the living room is at the very front. (wikipedia).
As we know, lounge is resemble with sitting room, or waiting room for some passanger, like at airport lounge. Lounge ussualy designed to make people more relax and enjoying live music or just music background.
I think Lounge is more like transit room, or we can call it just waiting room with cozy and relaxing environtment, which make people don't get bored on what they waiting for. So, if we want to start doing some design job for a lounge interior , firstly we have to know which color and lighting that will lead people stay without get bored.